The hot air we breathe out contains water vapours which turn into tiny droplets of water when it comes in contact with the colder glass of spectacles.

True

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False

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Solution

The correct option is A True
The air blown from the mouth is hot and the glass of the spectacles is comparatively colder. The hot air we breathe out contains water vapours which turn into tiny droplets of water when it comes in contact with the colder glass. This makes the glass moist and hazy. Therefore, the given statement is true.

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Similar questions

Water droplets appear when air comes in contact with a cool surface. This represents the presence of:

Which of the following statements are ‘True’?

(a) Water vapour is present in air only during the monsoon. ( )

(b) Water evaporates into air from the oceans, rivers, and lakes, but not from soil. ( )

(d) The evaporation of water takes place only in sunlight. ( )

(e) Water vapour condenses to form tiny droplets of water in the upper layer of air, where it is cooler. ( )

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